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Thread: 1150 Stumbling like a low on gas Airhead?

  1. #1
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    1150 Stumbling like a low on gas Airhead?

    I know many of you are at the Rally. Took the bike out to warm up the oil for a change. The fuel light was on so I know it was low, with 150 miles on the tank (Rockster doesn't get a long range(. After some side to side sloshing, the light went out and as I proceeded to the gas station, it stumbled like an old airhead when it's low on fuel. I filled it up and for the first mile or two same issue. I stopped to spectate a traffic accident and the last 2 miles to home seemed to be OK. Any guesses as to what might be up? Might do some test riding this afternoon when the oil change is done. I have a big trip planned in a couple weeks and now I'm a little worried.

    Bike has 40,000 miles. 2004.
    2004 R1150R Rockster | 1981 R100 | 2019 KLX250 | 1980 R65 (sold)

  2. #2
    Registered User dieselyoda's Avatar
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    Doesn't sound like a trip breaker, change the spark plugs.
    1997 R1100RT, 1981 KZ 440 LTD, R80RT, R90/6 sidecar, K1100RS,1983 K100RS (Cafe now)

    The major civilizing force in the world is not religion, it is sex.

  3. #3
    Water in fuel that was in the bottom got agitated when you sloshed it side-to-side. Then settled back to the bottom later. I would add a half bottle of IsoHeet in the red bottle.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  4. #4
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    Took it for a test ride and it got worse. Way worse. I rented the trailer and hauled it to a shop. Tech seems to think its a bad coil. He swapped one in while I was there and it was instantly better. It's still at the shop to get a full diagnosis. I'll report back.
    2004 R1150R Rockster | 1981 R100 | 2019 KLX250 | 1980 R65 (sold)

  5. #5
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    Quote Originally Posted by R65_Steve View Post
    Took it for a test ride and it got worse. Way worse. I rented the trailer and hauled it to a shop. Tech seems to think its a bad coil. He swapped one in while I was there and it was instantly better. It's still at the shop to get a full diagnosis. I'll report back.


    Yeah, that's what it was. Replaced them both for good measure. Back in business!
    2004 R1150R Rockster | 1981 R100 | 2019 KLX250 | 1980 R65 (sold)

  6. #6
    Registered User bluehole's Avatar
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    Thanks for the follow up. It is good to know what caused the problem and we are glad you are back in business.
    1972 R75/5
    1993 R100R

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